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Old 2016-01-01, 13:45   #1
Kosmaj
 
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Nov 2003

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Default Largest k*2^n-1 Primes Found In 2015

Here is the list of 100 largest "Riesel" primes (k*2^n-1, k>1) found in 2015.

Meaning of rank marks:
r1, rank on this list
r2, rank on the list of all known primes (as of January 1, 2016 at 0200 GMT)

Code:
----------------------------------------------------------
  r1   r2     description                    digits  who 
----------------------------------------------------------
   1   12  3*2^11895718-1                   3580969 L4159
   2   13  3*2^11731850-1                   3531640 L4103
   3   36  1583*2^5989282-1                 1802957 L4036
   4   75  17*2^4107544-1                   1236496 L4113
   5   79  1993191*2^3986382-1              1200027 L3532
   6  141  57*2^3339932-1                   1005422 L3519
   7  166  2751*2^3206569-1                  965277 L4036
   8  181  19401*2^3086450-1                 929119  L541
   9  212  5903*2^2938744-1                  884654 L4036
  10  278  7335*2^2689080-1                  809498 L4036
  11  321  65*2^2583720-1                    777780 L2484
  12  325  61*2^2580689-1                    776867 L2484
  13  373  99*2^2455541-1                    739194 L1862
  14  438  7913*2^2275664-1                  685048 L4036
  15  448  39*2^2251104-1                    677652  L177
  16  459  5055*2^2242777-1                  675147 L4036
  17  492  45*2^2205977-1                    664067 L1862
  18  526  315*2^2179612-1                   656132 L2235
  19  527  1423*2^2179023-1                  655955 L3887
  20  529  1423*2^2178363-1                  655756 L3887
  21  580  307*2^2137553-1                   643471 L2235
  22  587  319*2^2130729-1                   641416 L1817
  23  620  1246461300659*2^2103424-1         633206 L2484
  24  667  99*2^2070908-1                    623408 L1862
  25  719  325*2^2024035-1                   609298 L4076
  26  751  249*2^2001627-1                   602553 L1862
  27  772  1455*2^1988795-1                  598691 L1134
  28  831  149*2^1945668-1                   585707 L3967
  29  856  2135489665061*2^1929362-1         580809 L2484
  30  867  1187*2^1918188-1                  577436 L1828
  31  868  1071*2^1917749-1                  577304 L1828
  32  873  1065*2^1916200-1                  576837 L1828
  33  885  263*2^1904406-1                   573286 L2484
  34  894  3945*2^1894329-1                  570254 L4036
  35  895  4157*2^1892772-1                  569785 L1959
  36  916  283*2^1879051-1                   565654 L2484
  37  928  4125*2^1874718-1                  564350 L1959
  38  933  4039*2^1872875-1                  563796 L1959
  39  951  281*2^1860862-1                   560178 L2484
  40  953  231*2^1860743-1                   560142 L1862
  41  958  1455*2^1858634-1                  559508 L1134
  42  965  435*2^1853363-1                   557921 L4036
  43  991  4167*2^1836466-1                  552835 L1959
  44 1012  4029*2^1824569-1                  549254 L1959
  45 1017  4005*2^1823819-1                  549028 L1959
  46 1032  4065*2^1817502-1                  547127 L1959
  47 1036  4101*2^1816007-1                  546677 L1959
  48 1056  4039*2^1805627-1                  543552 L1959
  49 1069  4009*2^1799073-1                  541579 L1959
  50 1075  197*2^1796284-1                   540738 L1862
  51 1076  4137*2^1796226-1                  540722 L1959
  52 1079  4119*2^1794544-1                  540216 L1959
  53 1091  4125*2^1788660-1                  538444 L1959
  54 1116  31521*2^1778899-1                 535507 L3519
  55 1127  4053*2^1773028-1                  533739 L1959
  56 1137  4045*2^1765913-1                  531597 L1959
  57 1147  255*2^1763221-1                   530785 L2484
  58 1234  4065*2^1727864-1                  520143 L1959
  59 1238  4129*2^1727119-1                  519919 L1959
  60 1242  4179*2^1725552-1                  519447 L1959
  61 1245  4157*2^1724202-1                  519041 L1959
  62 1254  4071*2^1721361-1                  518185 L1959
  63 1264  4179*2^1716052-1                  516587 L1959
  64 1298  4149*2^1701565-1                  512226 L1959
  65 1303  2444379546449*2^1699964-1         511753 L2484
  66 1306  4133*2^1699380-1                  511568 L1959
  67 1314  4023*2^1695443-1                  510383 L1959
  68 1324  4135*2^1689399-1                  508564 L1959
  69 1355  4115*2^1676476-1                  504674 L1959
  70 1359  4175*2^1674484-1                  504074 L1959
  71 1368  229*2^1670843-1                   502977 L1862
  72 1377  4101*2^1667313-1                  501915 L1959
  73 1397  6213*2^1655136-1                  498250 L4036
  74 1429  1695*2^1645579-1                  495372  L527
  75 1438  4067*2^1639338-1                  493494 L1959
  76 1443  4005*2^1638053-1                  493107 L1959
  77 1463  2115*2^1631867-1                  491245 L1862
  78 1464  4103*2^1629508-1                  490535 L1959
  79 1472  2115*2^1626565-1                  489649 L1862
  80 1483  3147*2^1620488-1                  487819 L4036
  81 1490  4041*2^1617699-1                  486980 L1959
  82 1500  231*2^1612617-1                   485449 L1862
  83 1524  4011*2^1599078-1                  481375 L1959
  84 1579  4009*2^1582889-1                  476501 L1959
  85 1600  4065*2^1576362-1                  474536 L1959
  86 1613  4067*2^1570800-1                  472862 L1959
  87 1648  4053*2^1550167-1                  466651 L1959
  88 1656  4113*2^1547054-1                  465714 L1959
  89 1657  4101*2^1546943-1                  465680 L1959
  90 1662  4053*2^1545380-1                  465210 L1959
  91 1687  4039*2^1534551-1                  461950 L1959
  92 1691  2445*2^1532647-1                  461377 L1862
  93 1698  1455*2^1529868-1                  460540 L1134
  94 1729  4047*2^1514401-1                  455884 L1959
  95 1739  4125*2^1510620-1                  454746 L1959
  96 1742  4159*2^1509203-1                  454319 L1959
  97 1744  405*2^1508592-1                   454135 L1862
  98 1759  4163*2^1500990-1                  451847 L1959
  99 1866  2175*2^1466621-1                  441501 L1862
 100 1870  8413*2^1464751-1                  440938 L4113
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The list of 100 largest Riesel primes found in 2014 can be found here.
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